Faster compilation in PR pipeline (#823)

* Faster compilation in PR pipeline

* Add comment

Author: mmghannam

.github/workflows/coverage.yml

@@ -37,7 +37,9 @@ jobs:
           python -m pip install networkx cython pytest-cov
 
       - name: Install PySCIPOpt
-        run: python -m pip install .
+        run: |
+          export CFLAGS="-O0 -ggdb" # disable compiler optimizations for faster builds
+          python -m pip install .
 
       - name: Run pyscipopt tests
         run: |